<template>
 <view class="goods-item">
   <!--  商品列表组件 -->
   <!-- 左侧图片区域 -->
   <view class="goods-item-left">
     <radio :checked="goods.goods_state" color="#C00000" v-if="showRadio" @click="radioClickChange"></radio>
     <image :src="goods.goods_small_logo || defaultPic" class="goods-pic"></image>
   </view>
   <!-- 右侧信息区域 -->
   <view class="goods-item-right">
     <!-- 商品标题 -->
     <view class="goods-name">{{goods.goods_name}}</view>
     <view class="goods-info-box">
       <!-- 商品价格 -->
       <view class="goods-price">${{goods.goods_price | tofixed}}</view>
       <!-- 商品数量  输入框只允许输入数值也可以用 :value.numBer -->
       <uni-number-box :value="goods.goods_count" v-if="showNum" @change="numChangeHandler"></uni-number-box>
     </view>
   </view>
 </view>
</template>

<script>
  export default {
    name:"my-goods",
    data() {
      return {
        // 当后端图片数据加载不出来的时候,默认选中以下图片
        defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png'
      };
    },
    props: {
      goods: {
        type: Object,
        default: {}
      },
       // 是否展示图片左侧的 radio
      showRadio: {
        type: Boolean,
        default: false
      },
      showNum: {
        type: Boolean,
        default: false
      }
    },
    methods: {
      // radio 组件的点击事件处理函数
      radioClickChange() {
        // 通过 this.$emit() 触发外界通过 @ 绑定的 radio-change 事件，
        // 同时把商品的 Id 和 勾选状态 作为参数传递给 radio-change 事件处理函数
        this.$emit('radio-change', {
          goods_id: this.goods.goods_id,
            // 商品最新的勾选状态
          goods_state: !this.goods.goods_state
        })
      },
      numChangeHandler(val) {
        // 通过 this.$emit() 触发外界通过 @ 绑定的 num-change 事件
        this.$emit('num-change', {
          goods_id: this.goods.goods_id,
          // 商品的最新数量 需要字符串
          goods_count: +val
        })
      }
    },
    // 定义过滤器 显示小数点后两位
    filters: {
      tofixed(num) {
        return Number(num).toFixed(2)
      }
    }
  }
</script>

<style lang="scss">
.goods-item {
     // 让 goods-item 项占满整个屏幕的宽度
     width: 750rpx;
     // 设置盒子模型为 border-box
     box-sizing: border-box;
     display: flex;
     padding: 10px 5px;
     border-bottom: 1px solod #efefef;
     
     .goods-item-left {
       display: flex;
       justify-content: space-between;
       align-items: center;
       margin-right: 5px;
       
       .goods-pic {
         width: 100px;
         height: 100px;
         display: block;
         
       }
     }
     .goods-item-right {
       display: flex;
       flex: 1;
       flex-direction: column;
       justify-content: space-around;
       .goods-name {
         font-size: 13px;
       }
       .goods-info-box {
         display: flex;
         justify-content: space-between;
         .goods-price {
           font-size: 16px;
           color: #c00000;
         }
       }
     }
   }
</style>